5 Parameter
BU 0600 en-2319 81
P103 Deceleration time P
Factory setting { 2.00 }
The deceleration time is the time corresponding to the linear frequency reduction from
the set maximum frequency P105 to 0 Hz. If an actual setpoint <100 % is being used,
the deceleration time reduces accordingly.
The deceleration time can be extended by certain circumstances, e.g. by the selected
"Switch-off mode" P108 or "Ramp smoothing" P106.
Care must be taken that the parameter values are realistic. A setting of P103 = 0 is
not permissible for drive units!
Notes on ramp gradient: see P102
P104 Minimum frequency P
Factory setting { 0.0 }
The minimum frequency is the frequency supplied by the FI as soon as it is enabled
and no additional setpoint is set.
In combination with other setpoints (e.g. analogue setpoint or fixed frequencies) these
are added to the set minimum frequency.
This frequency is undershot when
• The drive is accelerated from standstill.
• The FI is blocked. The frequency then reduces to the absolute minimum P505
before it is blocked.
• The FI reverses. Reversal of the rotation field takes place at the absolute minimum
frequency P505.
This frequency can be continuously undershot if the function "Maintain frequency"
(Digital input function = 9) is executed during acceleration or deceleration.
P105 Maximum frequency P
Factory setting { 50.0 }
The frequency supplied by the FI after being enabled and once the maximum setpoint
is present, (e.g. analogue setpoint according to P403, a correspondingly fixed
frequency or maximum via a ParameterBox).
This frequency can only be overshot by the slip compensation P212, the function
"Maintain frequency" (Digital input function = 9) or a change to another parameter set
with lower maximum frequency.
Maximum frequencies are subject to certain restrictions, e.g.
• Restrictions in weak field operation,
• Compliance with mechanically permissible speeds,
• PMSM: Restriction of the maximum frequency to a value which is slightly above
the rated frequency. This value is calculated from the motor data and the input
voltage.
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